what the city is doing in the mission. >>> plus, all eyes are on new orleans. what will san francisco police chief greg sir do if the niners lose. those stories and moment coming up at 6:00. >> san francisco's grace cathedral showed its support for the niners today. >> the clergy dressed in red and gold vestments during the sunday service, getting interest the team spirit at church. >> the bishop of california has a bet on the game with the bishop of maryland. the winner gets a gift basket and the loser makes a donation to charity. >> didn't know bishops could bet. >> that's a great idea. never thought of that. >> they can get away with it. >> that's right. that does it for us here at captioned by closed captioning services inc. >>> this is "world news tonight." the navy s.e.a.l. targeted. known as america's deadliest sniper. he was a champion of returning veterans. gunned down by a fellow vet. tonight the suspect, the investigation and martha raddatz standing by on the bigger question surrounding post-traumatic stress after war. is it america's invisible epide